Below is a list of relevant web links to river related tools and datasets.

River Habitat Survey

The River Habitat Survey is a methodology for recording habitat features for wildlife that was designed by the Environment Agency, England and Wales and has since been applied in many other countries.

The company who developed the Strahler Stream Order Algorithm.

BioFresh Logo

A web site listing a selection of useful shapefiles in freshwater biodiversity research.

You can download global or regional river networks generated from elevation data obtained during a Space Shuttle flight for NASA's Shuttle Radar Topography Mission (SRTM). Developed by the World Wildlife Fund in partnership with USGS, CIAT, TNC and CESR.

The American national river network. You can download detailed river networks for all States of America.

The website where you can download the 1:500K river network of South Africa.

The CCM2 database covers the entire European continent, including the Atlantic islands, Iceland and Turkey. It includes a hierarchical set of river segments and catchments based on the Strahler order, a lake layer and structured hydrological feature codes based on the Pfafstetter system.

A site hosting links and research material in fluvial geomorphology.

A website dedicated to GIS and Hydrology.

ESRI and the ESRI Logo are licensed trademarks of

Environmental Systems Research Institute, Inc.

Code Sharing (formerly ArcScript) website, a huge source of ESRI user community scripts. From here you can follow links to the newer code galleries for ArcGIS 10+